Offshore cargo rack for use in transferring palletized loads between a marine vessel and an offshore platform

Abstract

A cargo rack for transferring loads between a marine vessel and an offshore marine platform (for example, oil and gas well drilling or production platform) provides a frame having a front, a rear, and upper and lower end portions. The lower end of the frame has a perimeter beam base, a raised floor and a pair of open-ended parallel fork tine tubes or sockets that communicate with the perimeter beam at the front and rear of the frame, preferably being structurally connected (e.g., welded) thereto. Openings in the perimeter beam base align with the forklift tine tubes or sockets. The frame includes a plurality of fixed side walls extending upwardly from the perimeter beam that include at least left and right side walls. A plurality of gates are movably mounted on the frame including a gate at least at the front and at least at the rear of the frame, each gate being movable between open and closed positions, the gates enabling a forklift to place loads on the floor by accessing either the front of the frame or the rear of the frame. Each gate can be pivotally attached to a fixed side wall. The frame has vertically extending positioning beams or lugs that segment the raised floor into a plurality of load-holding positions. Each load holding position has a plurality of positioning beams or lugs that laterally hold a load module (e.g., palletized load) in position once a load is placed on the raised floor.

The invention claimed is: 
     
       1. A cargo rack comprising:
 a) a frame having a front, a rear, and upper and lower end portions; 
 b) a plurality of load modules to be transported with said frame; 
 c) the lower end portion of the frame having a perimeter beam base with a floor providing multiple load holding positions, each load holding position configured to hold a separate one of multiple load modules; 
 d) the frame including a plurality of side walls that attach to and extend upwardly from the perimeter beam base and including at least left and right side walls, the frame having four corners with a corner column at each corner; 
 e) at least one intermediate column positioned in between two corner columns; and 
 f) a plurality of gates that are movably mounted to the frame, each gate being movable between open and closed positions, each gate spanning in a horizontal direction from a corner column to an intermediate column. 
 
     
     
       2. The cargo rack of  claim 1  wherein there are four load holding positions. 
     
     
       3. The cargo rack of  claim 1  wherein there are a pair of gates at the front of the frame. 
     
     
       4. The cargo rack of  claim 1  wherein there are a pair of gates at the rear of the frame. 
     
     
       5. The cargo rack of  claim 1  wherein at least a part of the floor is inclined. 
     
     
       6. The cargo rack of  claim 5  wherein the floor attaches to an upper end portion of the perimeter beam base. 
     
     
       7. The cargo rack of  claim 5  wherein there is a drain opening in the floor. 
     
     
       8. The cargo rack of  claim 1  wherein the floor attaches to an upper end portion of the perimeter beam base. 
     
     
       9. The cargo rack of  claim 1  further comprising clamps movably attached to the upper end of the frame between clamping and release positions for restraining vertical movement of a said load module that is placed on the floor. 
     
     
       10. The cargo rack of  claim 1  further comprising raised portions that extend above the floor for providing a level surface to engage a said load module placed on a load holding position of the frame. 
     
     
       11. A cargo rack comprising:
 a) a frame having a base with a perimeter, a front, a rear, and upper and lower end portions; 
 b) the frame including a plurality of side walls extending upwardly from the frame base perimeter and including at least left and right side walls, four corners that each provide a corner column and an intermediate column at the front and rear of the frame, each intermediate column positioned in between two said corner columns; 
 c) a plurality of gates that are movably mounted to the frame, each gate being movable between open and closed positions, each gate extending between a said corner column and a said intermediate column; and 
 d) the frame having a raised floor that provides a plurality of load holding positions. 
 
     
     
       12. The cargo rack of  claim 11  wherein there are four load holding positions. 
     
     
       13. The cargo rack of  claim 11  wherein there are a pair of gates at the front of the frame. 
     
     
       14. The cargo rack of  claim 11  wherein there are a pair of gates at the rear of the frame. 
     
     
       15. The cargo rack of  claim 11  wherein the floor includes inclined portions. 
     
     
       16. The cargo rack of  claim 15  wherein there is a drain in the floor. 
     
     
       17. The cargo rack of  claim 11  wherein the frame base includes a plurality of perimeter beams and the floor attaches to the perimeter beams. 
     
     
       18. The cargo rack of  claim 17  wherein the floor attaches to the upper end portion of at least one of the perimeter beams. 
     
     
       19. The cargo rack of  claim 11  further comprising clamps movably attached to the upper end of the frame between clamping and release positions for restraining vertical movement of a load that is placed on the floor. 
     
     
       20. The cargo rack of  claim 11  wherein there are four load holding positions.